Device for crimping sheet-metal elbows and pipe.



. PATENTED NOV. 17, 1903,

J. BAEUMLE. DEVICE FOR GRIMPING SHEET METAL ELBOWS AND PIPE;-

APPLIOATION FILED NOV. 3, 1902.

1 10 MODEL.

UNITED STATES Patented November 17, 1903.

PATENT OFFICE.

JOHN BAEUMLE, OF MILWAUKEE, WISCONSIN, ASSIGN OR OF ONE-HALF TO "J. P.LINDEMANN & SONS, A CORPORATION OF WISCONSIN.

' revoluble block F by the pins F.

DEVICE FOR'CRIMPING SHEET-METAL ELBOW S AND PIPE.-

, SPECIFICATION forming part of Letters Patent'No. 744,672, datedNovember 17, 1903.

A Application filed November 3, 1902 Serial No. 129,829. (No model.)

To all whom it may concern:

Be it known that 1, JOHN BAEUMLE, a citizen of the United States,residing at Milwaukee, county of Milwaukee, and State of Wisconsin, haveinvented new and useful Improvements in Devices for Orimping Sheet-Metal Elbows and Pipe, of which the following is a specification.

My invention relates to improvements in machines for crimping andcontracting the ends of sheet-metal elbows and pipes.

The construction of my invention is explained by reference to theaccompanying drawings, in whichf Figure 1 represents a front view. Fig.2 is a longitudinal vertical section, and Fig. 3 is a detailrepresenting an enlarged view of a portion of the crimping mechanism.

Like parts are identified by the same reference-letters throughout theseveral views.

The crimping mechanism of my device comprises a stationary annularcollar A, providedwith a series of inwardly-projecting crimping-teeth Band one or more pinions '0, provided with crimping-teeth D, which meshin the series of teeth B. The pinions (J are supported upon thetrunnions E, which trunnions are pivotally connected with the The blockF is feathered to the shaft G and revolves with it, said shaft beingsupported at its respective ends in the journal-bearings H H of theframe I. Motion, is communicated to the shaft G from the motive power inthe ordinary way through the pulley J. One end of the shaft G isprovided with a revoluble collar K, the angular surface L of which bearsagainst the angular bearing-surface M of the revoluble pinions O, whichpinions are rev0lu-' bly supported upon the ends of the trunnions E. Theshaft G is adapted to be reciprocated in its journal-bearings throughand without moving the block F as it is being revolved, suchreciprocating motion being communicated thereto from the pedal P throughthe link Q, elbow crank-lever R, bifurcated arms S, and collars T.

The elbow crank-lever R is pivotally supported from the frame I near itscenter upon the bolt 1, while its bifurcated arms S have bearingsbetween the collars T, which collars are in turn rigidly secured to theshaft G. One 'end of the treadle P is pivotally supported at a fixedpoint beneath the frame of O the machine by the bracketU and pivotalbolt V, while the opposite end of said treadle is connected with theframe Iof the machine by'thespiral spring W. Thus it will be obviousthat by the downward pressure of the treadle P motion will becommunicated therefrom through the linkQ, elbow crank-lever R, andcollars T to said shaft G, whereby said shaft will be thrown toward theleft and the collars K will be drawn between the opposing pinions O ofthe trunni0nsE,the1-eby causing said trunnions E, with the pinions O, tobe thrown apart and the teeth of said pinions O to be broughtinto meshwith the teeth B of the stationary collar A. When the treadleP isrelieved from pressure, the same will be drawn upwardly by the recoilofthe spring W, whereby the movement of saidshaft G will be reversed,and the trunnions E will be thrown toward each other and said centralshaft G by the-recoil of the spiral spring A.

B represents the end of an elbow as it is being inserted between thecrimping-teeth of the machine preparatory to being crimped.

The spiral springs A are retained in place in the recesses O by thethreaded bearings D, which have screw-threaded bearings in said recess0, and the tension of said springs A is increased or diminished byturning said bearings D forward or backward in their bear- 8 5 lngs.

The frame I of the machine is usually placed upon a bench, while thebracket U, to which the treadle P is attached, is usuallysecured to thefloor of the building in the ordinary o manner. It will be understoodthat the teeth of the annular collar A are formed at an angle to theshaft G, divergingoutwardly slightly, corresponding with the angle to begiven to I the end of the elbow of length of pipe, and 5 that thetrunnions E when thrown apart in' the act of crimping the elbow Will bebrought to such an angle to said shaft G as to cause the teeth on thepinions O to correspond with the angle of the teeth B of the collar A.

The annular collar A is'removably supported from the head-block E, whichhead-block IOO E is in turn secured to the frame I by the bolts G. Thecollar A may be substituted by other collars of greater or less internaldiameter to correspond with the difierent sizes of elbows or pipes whichit may be desirous to crimp.

It will of course be understood that when operating the machine theshaft G and the pulley J are kept in constant motion, so that when thepedal is relieved from pressure the pinions C revolve free from contactwith the teeth of the stationary collar A. When, however, the operatorinserts the end of the elbow or length of pipe to be crimped between theopposing teeth of the collar A and the pinions C, he simultaneouslyplaces his foot upon the treadle P, whereby said teeth are broughttogether upon the respective sides of the metal forming the elbow, whenthe front edge of the metal forming such elbow will be graduallycrimpedand contracted to conform to the angular shape of the teeth on thecollar A and pinions G as the elbow or length of pipe is graduallyforced between them. It will also be understood that when crimping andcontracting the ends of the elbow or length of pipe with this machinethey are all made of uniform size and describe at their ends an exactcircle corresponding in size and shape with the annular collar A, inwhich they are crimped.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A machine for crimping and contracting the ends of sheet-metalpipe-elbows and pipe, comprising the combination of a stationaryannularcollar provided with a series of crimping-teeth; a revolubleshaft supported within said collar; a plurality of pinions provided withcrimping teeth, revolubly supported from said shaft within saidstationary collar; means for revolving said pinions around said shaftwithinsaid stationary collar; and means for separating said pinions andforcing them outwardly toward said stationary collar as they are beingrevolved.

2. In a machine of the class described, the combination of a stationarysupportingframe; a stationary annular collar supported from said frame,provided with a series of crimping-teeth; a-revoluble shaft; apinionsupporting block feathered to said shaft; a plurality of trunnionspivotally supported from said block; a plurality of crimping-pinions,revolubly supported from said trunnions; means for simultaneouslyrevolving said crimping-pinions and forcing them outwardly against thecrimping-teeth of said stationary collar.

3. In a machine of the described class, the combination with thesupporting-trunnions of the crimping-pinions of beveled-facedbearing-collars and with the opposing surface of the trunnion-supportingshaft of a central collar having its periphery beveled; and means formoving said central collar toward the right and left against the bearingon said pinions, whereby said trunnions and their supportingpinions maybe moved toward and from the central shaft as they are being revolved.

4. In a machine of the described class, the combination ofasupporting-frame; a central driving-shaft having journal-bearings insaid frame; means for communicating a longitudinal reciprocatingmovement to said shaft as it is being revolved; a driving-pulley securedto one end of said shaft, and a revoluble block feathered to itsopposite end; a plurality of trunnions supported from said revolubleblock; an elastic bearing for automatically forcing the free ends ofsaid trunnions toward each other when relieved from pressure; revolublecrimping-pinions supported from said trunnions; a beveled bearing-collarsecured to said central shaft, and adapted to bear at its peripheryagainst the bearing-surface of the pinions supported on said trunnions;a stationary head-block rigidly secured to the supporting-frame; anannular collar removably secured in said head-block,provided withinwardly-projecting crimping-teeth adapted to mesh with thecrimping-teeth of said crimping-pinions, all substantially as and forthe purpose specified.

In testimony whereof I affix my signature in the presence of twowitnesses.

JOHN BAEUMLE.

Witnesses:

J AS. 13. ERWIN, O. L. Roman.

